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DRIER.

APPLIGATION FILED SBPT.25, 1907.

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W. A. KNEMAN. DRIER.

APPLICATION FILED SEPT.25, 1907.

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PATENTED AUG-ll,l 1908.

WILLIAM ADOLPH KNEMAN, OF CUDAHY, WISCONSIN.

DRIER.

Specification of Letters Patent.

Patented Aug. 11, 1908.

Application filed September 25, 1907. Serial No 394,472.

To all 'whom 'it may concern:

Be it known that I, VVrLLrAM ADOLPH KNEMAN, a citizen of the United States, residing at Cudahy, in the county of Milwaukee and State of WVisconsin, have invented a new and useful Improvement in Driers, of which the following is a specification.

The object of my invention is to provide a novel construction of rotary drier which shall renderit peculiarly effective in drying rubber which has been reclaimed from rubberwaste by grinding the material to a finely divided condition and then boiling it in a suitable chemical solution to dissolve the fiber and effect devulcanization. The rubber so recovered requires to be thoroughly washed in water to remove the chemical adhering to it and cleanse it of impurities; and after it has been thus washed it must be carefully and thoroughly dried preparatory to making it up into stock to be sheeted and manufactured into rubber goods.

My improved drier is illustrated in the accompanying drawings, in which Figure 1 is an end-elevation of the machine; Fig. 2, a vertical section on line 2 of Fig. 1, and Fig. 3, a transverse section on line 3 of Fig. 2.

A sheet-metal drum 7 is provided centrally of its heads, about openings 8 and 9 therein, with tubular trunnions 10 and 11 at which it is journaled in horizontal position in endframes 12 and 13. Tith a coupling 14 on the outer end of the trunnion 12 is connected a pipe 15 having a lateral branch 16 for connection with a hot-air pipe 17 in which is interposed afan-blower (-not shown) of any suitable construction. Between the head-openings 8 and 9 there extends longitudinally through the center of the drum a tubular core 19 numerously perforated throughout its Wall, and this tube is preferably wrap ed with a layer of porous cloth 20. The waff of the drum is formed with a plurality of openings 21, shown in rectangular shape, each being provided with an open-work covering, which may be a screen, but I prefer to use for the purpose a strip of canvas-cloth 22 and it fits against the flanged margin of the opening upon which it is fastened by a spiderlike plate 23 removably fastened to the iange.

A steam-coil 24 enters the drum through the trunnion 10 at the stuffing-b 0X on its outer end and passes out through the opposite trunnion and stuffing-box on its outer end, being coupled by return-bends outside and inside the drum to extend back and forth within it near and about its interior wall, on which, at intervals between coils, areprovided to extend lengthwise of the drum, ribs 25, shown of inverted-V shape in cross-section, forming stirrers for the material undergoing the drying treatment.

To operate the drier, it is charffed with the damp rubber through a manho e 26 in the drum, which is then continuously rotated through the medium of a gear 27 about one end enga ed by a pinion 28 on a suitably-journa ed drum-shaft 29. During the rotation of the drum steam is coursed through the piping 24 for heating the material to evaporate its moisture, the action of the steam being su plemented by that of hot, dry air forced y the fan through the -pipe 15, the moisture-laden air escaping through the porously-covered openings 21. By directing the hot-air supply into the perforated tubular core 19 it is distributed uniformly from the longitudinal center of the drum throughout its interior with the advantage of avoiding stratification of the aircurrents, to which and the heat from the steamcoil the material is thoroughly subj ected by the tumbling or stirring action of the ribs 25, which serves to expose all the particles of the material to the heat. The material, when thoroughly dried, is discharged through the manhole 26 -on uncovering it and arresting the rotation of the drum to bring the manhole undermost.

The openings 21 require to be uncovered periodically to cleanse their erforated coverings or replace them with c ean ones, since the coverings become clogged in time with the materiaI; and 'the covering 20 on the core 19, which prevents the material from entering the latter through its perforations,also becomes clogged in time and requires renewal.

What I claim as new, and desire to secure by Letters Patent, .is-

1. In a rotary drier, the combination of a rotatably-supported drum having a plurality of openings 1n its circumferential wall provided with porous coverings, said drum forming a single compartment for the material to be dried, a steam-coil in position in the drum to be exposed to contact with said material, and a perforated hot-air pipe in the drum.

2. In a rotary drier, the combination of a rotatablysupported drum having a plurality of openings in its circumferential wall provided with orous coverings, said drum forming a sing e compartment for the mae terial to be dried, a steam-coil extending in the drum about its longitudinal center and exposed therein to contact with said material, and a perforated hot-air pipe extending through the drum axially thereof.

3, In a rotary drier, the combination of a rotatably-supported drum having a plurality of openings in its circumferential wall provided with porous coverings, said drum forming a single compartment for the material to be dried, a steamcoil extending lengthwise through the drum about its longitudinal center and exposed therein to contact with said material, a perforated hot-air pipe extending through the drum axially thereof, and ribs at intervals about the inner wallsurface of the drum.

4. In a rotary drier, the combination of a horizontally-supported drum forming a single compartment for the material to be dried having tubular end-trunnions communicating with it through its heads, with a plurality of openings about the drum-wall rovided with porous coverings, a steam-coi in the drum with its terminals passing through said trunnions, said coil being exposed in the drum to Contact with said material, a hot-air inletpipe connected with one trunnion, a perforated hot-air pipe extending axially in the drum between its heads, and means for rotating the drum.

5. A rotary drier comprising, in combination, a horizontally-supported drum having tubular end-trunnions communicating with it through its heads, with a plurality of openings about the drum-wall provided with removably-fastened porous coverings, said drum forming a single compartment for the material to be dried, a steam-coil extending lengthwise through the drum about its longitudinal center with the terminals of the coil passing through said trunnions, said coil being exposed in the drum to contact with said material, a hot-'air inlet-pipe connected with one trunnion, a perforated hot-air pipe extending axially in. the drum between its heads, stirrer-ribs at intervals about the inner wall-surface of the drum, and means for rotating the drum.

WILLIAM ADOLPH KNEMAN.

In presence of- RALPH SCHAEFER. W. T. JONES. 

